CN222123503U - A water heater and a water tank thereof - Google Patents

Abstract

The utility model discloses a heat exchanger and a water tank thereof, wherein the water tank of the water heater comprises: an inner tank, comprising a cylinder, the cylinder comprising a first end and a second end opposite to the first end; a heat exchanger, arranged on the outer peripheral wall of the cylinder, and provided with a first refrigerant inlet, a second refrigerant inlet, a refrigerant outlet, a first heat exchange channel, and a second heat exchange channel; wherein the first refrigerant inlet is arranged on the outer side of the first end, the second refrigerant inlet is arranged on the outer side of the second end, the refrigerant outlet is arranged on the outer side of the middle part of the cylinder, the first heat exchange channel extends from the first refrigerant inlet to the refrigerant outlet along the outer peripheral wall of the cylinder, and the second heat exchange channel extends from the second refrigerant inlet to the refrigerant outlet along the outer peripheral wall of the cylinder. The water temperature in the inner tank of the water tank is evenly distributed, thereby improving user experience.

Description

Water heater and water tank thereof

Technical Field

The utility model relates to the technical field of electric appliances, in particular to a water heater and a water tank thereof.

Background

At present, the heat pump water heater comprises an inner container and a micro-channel heat exchanger, wherein the micro-channel heat exchanger is arranged on the outer side wall of the inner container, and high-temperature refrigerant can heat water in the inner container when flowing through the micro-channel heat exchanger. The coolant inlet of the micro-channel heat exchanger is close to the top end of the inner container, the coolant outlet of the micro-channel heat exchanger is close to the bottom end of the inner container, and the coolant flows from top to bottom in the micro-channel heat exchanger, so that the water temperature of the top area of the inner container is higher, and the water temperature of the bottom area of the inner container is lower. Further, since the height of the liner in the vertical direction is large, for example, the height of the liner is generally more than 1 meter, this further results in a large temperature difference between the top and bottom of the liner. The large temperature difference between the upper part and the lower part of the inner container can cause large water temperature difference between the front part and the rear part when the inner container discharges hot water outwards, and seriously affects user experience.

Disclosure of utility model

The application provides a water tank of a water heater, which comprises:

The inner container comprises a cylinder body, wherein the cylinder body comprises a first end and a second end opposite to the first end;

The heat exchanger is arranged on the peripheral wall of the cylinder body and is provided with a first refrigerant inlet, a second refrigerant inlet, a refrigerant outlet, a first heat exchange flow channel and a second heat exchange flow channel;

The first refrigerant inlet is arranged at the outer side of the first end, the second refrigerant inlet is arranged at the outer side of the second end, the refrigerant outlet is arranged at the outer side of the middle of the cylinder, the first heat exchange flow channel extends from the first refrigerant inlet to the refrigerant outlet in a winding way along the peripheral wall of the cylinder, and the second heat exchange flow channel extends from the second refrigerant inlet to the refrigerant outlet in a winding way along the peripheral wall of the cylinder.

In one exemplary embodiment, the heat exchanger includes:

a first header provided with a plurality of first pipe sections spaced apart from each other in order from the first end to the second end;

A second header provided with a plurality of second pipe sections spaced apart from each other in order from the first end to the second end, the number of the second pipe sections being one more than the number of the first pipe sections, and

The heat exchange tubes are sequentially arranged side by side along the axial direction of the cylinder body, and two ends of each heat exchange tube are respectively connected with the first header and the second header;

One end of the ith first pipe section is communicated with the ith second pipe section through the heat exchange pipe, the other end of the ith first pipe section is communicated with the (i+1) th second pipe section through the heat exchange pipe, the first refrigerant inlet is arranged on the first second pipe section, the second refrigerant inlet is arranged on the last second pipe section, the refrigerant outlet is arranged on the first pipe section positioned in the middle of the first header or the second pipe section positioned in the middle of the second header, the first pipe section, the heat exchange pipe and the second pipe section which are communicated with the first refrigerant inlet and the refrigerant outlet form the first heat exchange flow channel, and the first pipe section, the heat exchange pipe and the second pipe section which are communicated with the second refrigerant inlet and the refrigerant outlet form the second heat exchange flow channel.

In one illustrative embodiment, the first tube segment is provided with three and the second tube segment is provided with four;

The refrigerant outlet is arranged on the first pipe section in the middle.

In an exemplary embodiment, the first tube section is provided with two and the second tube section is provided with three;

the refrigerant outlet is arranged on the second pipe section positioned in the middle.

In one illustrative embodiment, the first header includes a first tube extending from the first end to the second end and one or more first dividers disposed within the first tube, the first dividers dividing the first tube into a plurality of first tube segments, and/or,

The second header includes a second tube body extending from the first end to the second end and a plurality of second dividers disposed within the second tube body that divide the second tube body into a plurality of second tube segments.

In an exemplary embodiment, the heat exchange tube extends in a circumferential direction of the cylinder and is hooped on the cylinder.

In one illustrative embodiment, the heat exchange tube is a microchannel flat tube.

In one exemplary embodiment, the heat exchanger includes:

The refrigerant interface assembly comprises an input joint for receiving a refrigerant and an output joint for outputting the refrigerant;

An input pipe assembly connecting the input joint to the first refrigerant inlet and the second refrigerant inlet, and

And one end of the output pipe is connected with the output joint, and the other end of the output pipe is connected with the refrigerant outlet.

In one exemplary embodiment, the input tube assembly includes:

three-way pipe fittings provided with three interfaces;

One end of the main pipeline is connected with the input joint, and the other end of the main pipeline is connected with the first interface of the tee pipe fitting;

A first branch pipe with one end connected to the second port of the three-way pipe and the other end connected to the first refrigerant inlet, and

And one end of the second branch pipe is connected with a third interface of the tee pipe fitting, and the other end of the second branch pipe is connected with the second refrigerant inlet.

The application also provides a water heater, which comprises the water tank.

In the technical scheme of the application, the first refrigerant inlet and the second refrigerant inlet can be filled with the refrigerant, and the temperature of the refrigerant is higher than that of water in the inner container. The refrigerant transfers heat to the liner to heat water in the liner when flowing through the first heat exchange flow channel and the second heat exchange flow channel. A part of refrigerant flows from the first end of the inner container to the middle part of the inner container along the first heat exchange flow passage, and the part of refrigerant heats water in the first end of the inner container first and then heats water in the middle part of the inner container. The other part of the refrigerant flows from the second end of the inner container to the middle part of the inner container along the second heat exchange flow passage, and the part of refrigerant heats the water in the second end of the inner container first and then heats the water in the middle part of the inner container. From this, the water in the first end and the second end of whole heating process priority heating inner bag improves the temperature of the water in the first end and the second end of inner bag simultaneously, reduces the difference in temperature of the water in the first end and the second end of inner bag for temperature distribution in the inner bag is more even, promotes user experience.

Additional features and advantages of the utility model will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the utility model. The objectives and other advantages of the utility model may be realized and attained by the structure particularly pointed out in the written description and drawings.

Drawings

The accompanying drawings are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate and do not limit the utility model.

FIG. 1 is a schematic diagram of a water tank of a water heater according to an embodiment of the present utility model;

FIG. 2 is an expanded schematic view of a heat exchanger according to an embodiment of the present utility model;

Fig. 3 is an expanded schematic view of another heat exchanger in an embodiment of the utility model.

Reference numerals:

100. Water tank, 11, cylinder, 111, first end, 112, second end, 12, first end cover, 2, heat exchanger, 201, first refrigerant inlet, 202, second refrigerant inlet, 203, refrigerant outlet, 204, first heat exchange flow channel, 205, second heat exchange flow channel, 21, first header, 211, first pipe body, 2111, first pipe section, 2111a, first pipe section, 2111b, second first pipe section, 2111c, third first pipe section, 212, first separator, 22, second header, 221, second pipe body, 2211, second pipe section, 2211a, first second pipe section, 2211b, second pipe section, 2211c, third second pipe section, 1d, fourth second pipe section, 222, second separator, 23, heat exchange pipe, 24, connector, 25, refrigerant interface assembly, 251, base 252, input connector, 253, output connector, 261, 263, first branch pipe, 262, second branch pipe, 27, third pipe, and third branch pipe.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the present utility model more apparent, embodiments of the present utility model will be described in detail hereinafter with reference to the accompanying drawings. It should be noted that, without conflict, the embodiments of the present utility model and features of the embodiments may be arbitrarily combined with each other.

As shown in fig. 1, fig. 1 shows a structure of a water tank 100 of a water heater in the present embodiment. The water heater may be an air source heat pump water heater. The water heater includes a water tank 100 and an external machine (not shown). The external machine is connected with the water tank 100 through a refrigerant pipeline, and the external machine can drive the refrigerant to circulate between the external machine and the water tank 100 so as to absorb heat in the air to heat water stored in the water tank 100.

Water tank 100 includes a liner 1 and a heat exchanger 2. The inner container 1 has an inner cavity for storing water. The liner 1 includes a barrel 11, a first end cap 12, and a second end cap (not shown). The cylinder 11 may be cylindrical. The cylinder 11 is formed by welding plates. The sheet material may be a good conductor of heat, such as a stainless steel sheet or an enamelled steel sheet. The barrel 11 includes a first end 111 and a second end 112, the first end 111 and the second end 112 being disposed opposite. The first end 111 of the barrel 11 may be the end of the barrel 11 facing upward and the second end 112 of the barrel 11 may be the end facing downward. The first end cap 12 and the second end cap are configured in a generally disk-like structure. The first end cap 12 covers the first end 111 of the barrel 11 and seals the first end 111. The second end cap covers the second end 112 of the barrel 11 and seals the second end 112. The first end cap 12 and the second end cap may be welded to the cylinder 11, or may be screwed or riveted to the cylinder 11. The heat exchanger 2 is provided on the outer peripheral wall of the cylinder 11. The heat exchanger 2 and the cylinder 11 can be connected by screws, riveted or welded.

As shown in fig. 2, the heat exchanger 2 is provided with a first heat exchange flow passage 204, a second heat exchange flow passage 205, a first refrigerant inlet 201, a second refrigerant inlet 202, and a refrigerant outlet 203. The first refrigerant inlet 201 is provided outside the first end 111 of the cylinder 11. The second refrigerant inlet 202 is provided outside the second end 112 of the cylinder 11. The refrigerant outlet 203 is provided outside the middle of the cylinder 11. The first heat exchange flow passage 204 extends along the outer peripheral wall of the cylinder 11, and the first heat exchange flow passage 204 extends serpentine from the first refrigerant inlet 201 to the refrigerant outlet 203. The second heat exchange flow passage 205 extends along the outer peripheral wall of the cylinder 11, and the second heat exchange flow passage 205 extends serpentine from the second refrigerant inlet 202 to the refrigerant outlet 203.

The first refrigerant inlet 201 and the refrigerant outlet 203 are respectively connected to opposite ends of the first heat exchange channel 204. The first refrigerant inlet 201 is used for injecting refrigerant into the first heat exchange flow channel 204. The second refrigerant inlet 202 and the refrigerant outlet 203 are respectively connected to opposite ends of the second heat exchange flow channel 205. The second refrigerant inlet 202 is used for injecting refrigerant into the second heat exchange flow channel 205. The refrigerant outlet 203 is configured to discharge the refrigerant in the first heat exchange flow channel 204 out of the first heat exchange flow channel 204 and discharge the refrigerant in the second heat exchange flow channel 205 out of the second heat exchange flow channel 205.

The first refrigerant inlet 201 and the second refrigerant inlet 202 of the heat exchanger 2 can be connected with the refrigerant outlet of the external machine of the water heater through refrigerant pipelines, the refrigerant outlet 203 of the heat exchanger 2 is connected with the refrigerant reflux inlet of the external machine of the water heater through refrigerant pipelines, and the refrigerant outlet of the external machine conveys gaseous refrigerant to the first refrigerant inlet 201 and the second refrigerant inlet 202, and the temperature of the refrigerant is higher than the temperature of water in the liner 1. When flowing through the first heat exchange flow channel 204 and the second heat exchange flow channel 205, the gaseous refrigerant transfers heat to the inner container 1 to heat water in the inner container 1, the gaseous refrigerant releases heat to be converted into liquid refrigerant, and the liquid refrigerant is discharged from the refrigerant outlet 203 and flows back to the external machine.

A part of the refrigerant flows from the first end 111 of the inner container 1 to the middle part of the inner container 1 along the first heat exchange flow passage 204, and the part of the refrigerant heats the water in the first end 111 of the inner container 1 first and then heats the water in the middle part of the inner container 1. The other part of the refrigerant flows from the second end 112 of the inner container 1 to the middle part of the inner container 1 along the second heat exchange flow passage 205, and the part of the refrigerant heats the water in the second end 112 of the inner container 1 first and then heats the water in the middle part of the inner container 1. Therefore, the whole heating process preferentially heats the water in the first end 111 and the second end 112 of the liner 1, simultaneously improves the temperature of the water in the first end 111 and the second end 112 of the liner 1, reduces the temperature difference of the water in the first end 111 and the second end 112 of the liner 1, ensures that the water temperature distribution in the liner 1 is more uniform, and improves the user experience.

In one illustrative embodiment, as shown in FIGS. 1 and 2, the heat exchanger 2 includes a first header 21, a second header 22, and a plurality of heat exchange tubes 23. The heat exchange tubes 23, the first header 21 and the second header 22 are all provided on the outer peripheral wall of the cylindrical shell 11. The first header 21 and the second header 22 may each be constructed as a straight pipe. The first header 21 has both ends extending to a first end 111 and a second end 112 of the bowl 11, respectively. A plurality of first tube segments 2111 are provided in the first header 21, the plurality of first tube segments 2111 being arranged in sequence from the first end 111 of the barrel 11 to the second end 112 of the barrel 11, adjacent ones of the first tube segments 2111 being spaced apart from one another. The second header 22 extends at both ends to a first end 111 and a second end 112 of the bowl 11, respectively. A plurality of second tube segments 2211 are disposed in the second header 22, the plurality of second tube segments 2211 being arranged in sequence from the first end 111 of the cylinder 11 toward the second end 112 of the cylinder 11, and adjacent two second tube segments 2211 being spaced apart from each other. A space may be provided between the first tube segments 2111. The number of first tube segments 2111 is one less than the number of second tube segments 2211.

The heat exchange tube 23 extends along the circumferential direction of the cylindrical body 11 in close contact with the outer circumferential wall of the cylindrical body 11. One end of the heat exchange tube 23 is connected to a side wall of the first header 21 facing away from the second header 22, and the other end of the heat exchange tube 23 is connected to a side wall of the second header 22. The heat exchange tubes 23 are provided in plurality, and the plurality of heat exchange tubes 23 are arranged side by side in sequence along the axial direction of the cylinder 11.

In this embodiment, the first pipe sections 2111 are sequentially numbered in the order of the plurality of first pipe sections 2111 from the first end 111 of the cylinder 11 to the second end 112 of the cylinder 11, for example, the first pipe sections 2111 are provided with n, n being greater than or equal to 2, and the first pipe section 2111 closest to the first end 111 of the cylinder 11 is the first pipe section 2111, and the first pipe section 2111 closest to the second end 112 of the cylinder 11 is the nth first pipe section 2111. The second pipe sections 2211 are numbered consecutively in the order of the plurality of second pipe sections 2211 from the first end 111 of the cylinder 11 to the second end 112 of the cylinder 11, for example, the second pipe sections 2211 are provided with n+1, and then the second pipe section 2211 closest to the first end 111 of the cylinder 11 is the first second pipe section 2211, and the second pipe section 2211 closest to the second end 112 of the cylinder 11 is the n+1th second pipe section 2211. One end of the i-th first tube segment 2111 is connected to the i-th second tube segment 2211 through a heat exchange tube 23. The other end of the i-th first tube segment 2111 is connected to the i+1th second tube segment 2211 through a heat exchange tube 23. The heat exchange tube 23 that communicates the i-th first tube segment 2111 and the i-th second tube segment 2211 may be one or more. The heat exchange tubes 23 that communicate the i-th first tube segment 2111 and the i+1th second tube segment 2211 may be one or more. The first refrigerant inlet 201 is disposed on the first second pipe segment 2211, and may be the second pipe segment 2211 positioned at the top end of the second header 22. The second refrigerant inlet 202 is disposed in the last second tube segment 2211, which may be the second tube segment 2211 at the bottom end of the second header 22. The refrigerant outlet 203 may be provided at the first pipe segment 2111 located at the middle of the first header 21 when the number of the first pipe segments 2111 is greater than or equal to 3 as shown in fig. 2, and the refrigerant outlet 203 may be provided at the second pipe segment 2211 located at the middle of the second header 22 when the number of the second pipe segments 2211 is greater than or equal to 3 as shown in fig. 3.

In this way, a part of the first pipe section 2111, the heat exchange pipe 23, and the second pipe section 2211 can connect the first refrigerant inlet 201 and the refrigerant outlet 203, and the first pipe section 2111, the heat exchange pipe 23, and the second pipe section 2211, which connect the first refrigerant inlet 201 and the refrigerant outlet 203, form the first heat exchange flow path 204. The heat exchanger 2 with the structure has simple structure and low manufacturing cost, and the first pipe section 2111, the heat exchange pipe 23 and the second pipe section 2211, which are connected with the second refrigerant inlet 202 and the refrigerant outlet 203, form the second heat exchange flow passage 205.

In one illustrative embodiment, the first header 21 includes a first tube body 211 and a first separator 212. The extending direction of the first tube body 211 is parallel to the axial direction of the cylinder 11. The first tube 211 is closed at both ends. The first separator 212 may be provided in one or more. The first separator 212 is disposed within the first tube 211. The first spacers 212 are sequentially arranged in the axial direction of the first tube body 211. The first spacers 212 are spaced apart from each other within the first tube 211. One or more first dividers 212 divide the first tube body 211 into a plurality of first tube segments 2111. The number of first tube segments 2111 is one more than the number of first dividers 212. The first separator 212 may be configured in a flat plate shape.

The second header 22 includes a second pipe body 221 and a second separator 222. The extending direction of the second tube 221 is parallel to the axial direction of the cylinder 11. The length of the second tube 221 may be the same as the length of the first tube 211. The second pipe 221 is closed at both ends.

The second spacers 222 are provided in plurality, and the number of the second spacers 222 may be one more than the number of the first spacers 212.

The second separators 222 are each disposed in the second pipe body 221. The second separators 222 are sequentially arranged in the axial direction of the second pipe body 221. The second spacers 222 are spaced apart from each other within the second pipe body 221. The plurality of second dividers 222 divide the second pipe body 221 into a plurality of second pipe segments 2211. The number of second tube segments 2211 is one more than the number of second spacers 222. The second separator 222 may be constructed in a flat plate shape, and the second separator 222 is perpendicular to the extending direction of the second header 22. The flow surfaces of the first tube body 211 and the second tube body 221 may be larger than the flow area of the heat exchange tube 23.

The first header 21 and the second header 22 are simple in structure and easy to manufacture.

In one illustrative embodiment, as shown in FIG. 2, two first dividers 212 are disposed within the first tube 211, the two first dividers 212 dividing the first tube 211 into three first tube segments 2111. Three second separators 222 are disposed in the second pipe body 221, and the three second separators 222 divide the second pipe body 221 into four second pipe sections 2211.

The upward end of the first tube segment 2111a is connected to the first second tube segment 2211a by the heat exchange tube 23, the downward end of the first tube segment 2111a is connected to the upward end of the second tube segment 2211b by the heat exchange tube 23, the upward end of the second first tube segment 2111b is connected to the downward end of the second tube segment 2211b by the heat exchange tube 23, the downward end of the second first tube segment 2111b is connected to the upward end of the third second tube segment 2211c by the heat exchange tube 23, the upward end of the third first tube segment 2111c is connected to the downward end of the third second tube segment 2211c by the heat exchange tube 23, and the downward end of the third first tube segment 2111c is connected to the fourth second tube segment 2211d by the heat exchange tube 23.

The refrigerant outlet 203 is provided in the first pipe section 2111 located in the middle, i.e., the second first pipe section 2111 b. The refrigerant outlet 203 may be disposed at a middle portion of the second first pipe section 2111 b. The first refrigerant inlet 201 is disposed on the first second pipe segment 2211a, and the second refrigerant inlet 202 is disposed on the fourth second pipe segment 2211 d.

Thus, a portion of the refrigerant may be injected into the first second segment 2211a from the first refrigerant inlet 201, and sequentially flows through the heat exchange tube 23 between the first tube segment 2111a and the first second tube segment 2211a, the first tube segment 2111a, the heat exchange tube 23 between the first tube segment 2111a and the second tube segment 2211b the second tube segment 2211b, the heat exchange tube 23 between the second tube segment 2211b and the second first tube segment 2111b and to the second first tube segment 2111b, and finally flows out from the refrigerant outlet 203 on the second first pipe section 2111 b. Another portion of the refrigerant may be injected into the fourth second tube segment 2211d from the second refrigerant inlet 202, sequentially flow through the heat exchange tube 23 between the fourth second tube segment 2211d and the third first tube segment 2111c, the heat exchange tube 23 between the third first tube segment 2111c and the third second tube segment 2211c, the heat exchange tube 23 between the third second tube segment 2211c and the second first tube segment 2111b, and reach the second first tube segment 2111b, and finally flow out from the refrigerant outlet 203 on the second first tube segment 2111 b.

In another illustrative embodiment, as shown in FIG. 3, a first divider 212 is disposed within the first tube 211, with the first divider 212 dividing the first tube 211 into two first tube segments 2111. Two second separators 222 are disposed in the second pipe body 221, and the two second separators 222 divide the second pipe body 221 into three second pipe sections 2211.

The upward end of the first tube segment 2111a is connected to the first second tube segment 2211a by a heat exchange tube 23, the downward end of the first tube segment 2111a is connected to the upward end of the second tube segment 2211b by a heat exchange tube 23, the upward end of the second first tube segment 2111b is connected to the downward end of the second tube segment 2211b by a heat exchange tube 23, and the downward end of the second first tube segment 2111b is connected to the third second tube segment 2211c by a heat exchange tube 23.

The refrigerant outlet 203 is provided in the second intermediate pipe segment 2211, i.e., the second pipe segment 2211 b. The refrigerant outlet 203 may be disposed at a middle portion of the second first pipe section 2111 b. The first refrigerant inlet 201 is disposed on the first second pipe segment 2211a, and the second refrigerant inlet 202 is disposed on the third second pipe segment 2211 c.

Thus, a portion of the refrigerant may be injected into the first second segment 2211a from the first refrigerant inlet 201, and sequentially flows through the heat exchange tube 23 between the first tube segment 2111a and the first second tube segment 2211a, the first tube segment 2111a, the heat exchange tube 23 between the first tube segment 2111a and the second tube segment 2211b to the second tube segment 2211b, and finally flows out from the refrigerant outlet 203 on the second pipe segment 2211 b. Another portion of the refrigerant may be injected into the third second pipe segment 2211c from the second refrigerant inlet 202, and sequentially flow through the heat exchange pipe 23 between the third second pipe segment 2211c and the second first pipe segment 2111b, the heat exchange pipe 23 between the second first pipe segment 2111b and the second pipe segment 2211b, reach the second pipe segment 2211b, and finally flow out from the refrigerant outlet 203 on the second pipe segment 2211 b.

In one exemplary embodiment, the heat exchange tube 23 extends in the circumferential direction of the cylinder 11. The heat exchange tube 23 is hooped around the outer peripheral wall of the tube 11. The heat exchange tube 23 is constructed as an arc tube. The arc of the heat exchange tube 23 is greater than pi. The arc of the heat exchange tube 23 is greater than or equal to 300 pi/180. All heat exchange tubes 23 extend from the side wall of the first header 21 on the side facing away from the second header 22 to the side wall of the second header 22 on the side facing away from the first header 21. The heat exchange tube 23 may be a metal tube. The metal tube has elasticity, can hoop on the periphery wall of barrel 11 through crooked elastic deformation for heat exchange tube 23 hugs closely in the periphery wall of barrel 11, need not fix heat exchange tube 23 on barrel 11 through the connecting piece, and heat exchange tube 23's installation is more convenient.

In one exemplary embodiment, the heat exchange tubes 23 are configured as microchannel flat tubes. The cross section of the microchannel flat tube is flat, the flat tube is favorable for being attached to the peripheral wall of the liner 1, and compared with a round tube, the microchannel flat tube is lighter in weight and has an increased effective heat exchange area under the same heat exchange amount, and the refrigerant filling amount can be effectively reduced. Each micro-channel flat tube is provided with a plurality of refrigerant flow channels, and each refrigerant flow channel extends from one end of the micro-channel flat tube to the other end of the micro-channel flat tube, so that the contact area between the refrigerant flowing through the micro-channel flat tube and the micro-channel flat tube can be further improved, and the heat exchange efficiency is further improved.

In one illustrative embodiment, as shown in FIG. 1, the heat exchanger 2 further includes an inlet tube assembly 26, an outlet tube 27, and a refrigerant interface assembly 25.

The refrigerant interface assembly 25 includes a base 251, an input connector 252, and an output connector 253. The base 251 is constructed as a bracket structure. The base 251 may be welded to the outer circumferential wall of the tub 11 on a side of the first header 21 facing away from the heat exchange tubes 23 and on a side of the second header 22 facing away from the heat exchange tubes 23. The input connector 252 and the output connector 253 are both provided on the base 251. One end of the input connector 252 faces the barrel 11 and the other end faces away from the barrel 11. One end of the output connector 253 faces the cylinder 11, and the other end faces away from the cylinder 11. The input fitting 252 may be a high pressure pipe fitting. The output connector 253 may be a low pressure pipe joint.

The input pipe assembly 26 includes a tee pipe 262, a main pipe 261, a first branch pipe 263 and a second branch pipe 264. The tee fitting 262 is provided with three interfaces which are interconnected. One end of the main pipe 261 is connected to one end of the input joint 252 facing the cylinder 11, and the other end of the main pipe 261 is connected to the first port of the three-way pipe 262. The second port of the three-way pipe 262 is connected to one end of the first branch pipe 263, and the other end of the first branch pipe 263 is connected to the first refrigerant inlet 201 of the heat exchanger 2. The third port of the three-way pipe 262 is connected to one end of the second branch pipe 264, and the other end of the second branch pipe 264 is connected to the second refrigerant inlet 202 of the heat exchanger 2.

One end of the output pipe 27 is connected to one end of the output joint 253 facing the cylinder 11, and the other end of the output pipe 27 is connected to the output joint 253 of the heat exchanger 2.

The input joint 252 and the output joint 253 can be externally connected with a refrigerant pipeline for connecting an external machine. The input joint 252 is used for receiving the refrigerant, and the output joint 253 is used for outputting the refrigerant. The external machine injects refrigerant into the input joint 252, and the refrigerant is injected into the first refrigerant inlet 201 and the second refrigerant inlet 202 of the heat exchanger 2 through the input pipe assembly 26, specifically, the refrigerant enters the main pipe 261 from the input joint 252, and is split into the first branch pipe 263 and the second branch pipe 264 by the three-way pipe 262, wherein one part of the refrigerant flows through the first branch pipe 263 to be injected into the first refrigerant inlet 201, and the other part of the refrigerant flows through the second branch pipe 264 to be injected into the second refrigerant inlet 202. The refrigerant in the heat exchanger 2 flows back to the external unit by being discharged from the water tank 100 through the refrigerant outlet 203, the discharge pipe 27 and the discharge joint 253.

In an exemplary embodiment, the liner 1 is provided with a water inlet (not shown) and a water outlet (not shown). The water inlet and the water outlet are both communicated with the inner cavity of the inner container 1. The water inlet is used for injecting water into the liner 1. The water outlet is used for discharging water in the inner container 1 out of the inner container 1. The water inlet may be disposed at the second end 112 of the barrel 11 and the water outlet may be disposed at the first end 111 of the barrel 11.

In an exemplary embodiment, the heat exchanger 2 further includes a plurality of connectors 24. A plurality of connection members 24 are provided on the first header 21 and the second header 22, respectively. A plurality of connectors 24 may be provided on the tube walls of both the first header 21 and the second header 22. The connecting member 24 on the first header 21 connects the first header 21 and the cylinder 11 of the liner 1. A connector 24 on the second header 22 connects the second header 22 to the barrel 11 of the liner 1.

In the description of the present utility model, it should be noted that, directions or positional relationships indicated by terms "upper", "lower", "one side", "the other side", "one end", "the other end", "the side", "the opposite", "four corners", "the periphery", "the" mouth "character structure", etc., are directions or positional relationships based on the drawings, are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the structures referred to have a specific direction, are configured and operated in a specific direction, and thus are not to be construed as limiting the present utility model.

In describing embodiments of the present utility model, unless explicitly stated or limited otherwise, the terms "connected," "directly connected," "indirectly connected," "fixedly connected," "mounted," "assembled" should be construed broadly, e.g., as being either fixedly connected or detachably connected, or integrally connected, and the terms "mounted," "connected," "fixedly connected" may be either directly or indirectly connected via an intermediate medium, or may be in communication with each other between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

Although the embodiments of the present utility model are described above, the embodiments are only used for facilitating understanding of the present utility model, and are not intended to limit the present utility model. Any person skilled in the art can make any modification and variation in form and detail without departing from the spirit and scope of the present disclosure, but the scope of the present disclosure is defined by the appended claims.

Claims (10)

1. A water tank for a water heater, comprising:

The inner container comprises a cylinder body, wherein the cylinder body comprises a first end and a second end opposite to the first end;

The heat exchanger is arranged on the peripheral wall of the cylinder body and is provided with a first refrigerant inlet, a second refrigerant inlet, a refrigerant outlet, a first heat exchange flow channel and a second heat exchange flow channel;

The first refrigerant inlet is arranged at the outer side of the first end, the second refrigerant inlet is arranged at the outer side of the second end, the refrigerant outlet is arranged at the outer side of the middle of the cylinder, the first heat exchange flow channel extends from the first refrigerant inlet to the refrigerant outlet in a winding way along the peripheral wall of the cylinder, and the second heat exchange flow channel extends from the second refrigerant inlet to the refrigerant outlet in a winding way along the peripheral wall of the cylinder.

2. The water tank of claim 1, wherein the heat exchanger comprises:

a first header provided with a plurality of first pipe sections spaced apart from each other in order from the first end to the second end;

A second header provided with a plurality of second pipe sections spaced apart from each other in order from the first end to the second end, the number of the second pipe sections being one more than the number of the first pipe sections, and

The heat exchange tubes are sequentially arranged side by side along the axial direction of the cylinder body, and two ends of each heat exchange tube are respectively connected with the first header and the second header;

One end of the ith first pipe section is communicated with the ith second pipe section through the heat exchange pipe, the other end of the ith first pipe section is communicated with the (i+1) th second pipe section through the heat exchange pipe, the first refrigerant inlet is arranged on the first second pipe section, the second refrigerant inlet is arranged on the last second pipe section, the refrigerant outlet is arranged on the first pipe section positioned in the middle of the first header or the second pipe section positioned in the middle of the second header, the first pipe section, the heat exchange pipe and the second pipe section which are communicated with the first refrigerant inlet and the refrigerant outlet form the first heat exchange flow channel, and the first pipe section, the heat exchange pipe and the second pipe section which are communicated with the second refrigerant inlet and the refrigerant outlet form the second heat exchange flow channel.

3. The water tank of claim 2, wherein the first pipe section is provided with three and the second pipe section is provided with four;

The refrigerant outlet is arranged on the first pipe section in the middle.

4. The water tank of claim 2, wherein the first pipe section is provided with two and the second pipe section is provided with three;

the refrigerant outlet is arranged on the second pipe section positioned in the middle.

5. The tank of claim 2 wherein the first header includes a first tube extending from the first end to the second end and one or more first dividers disposed within the first tube, the one or more first dividers dividing the first tube into a plurality of first tube segments and/or,

The second header includes a second tube body extending from the first end to the second end and a plurality of second dividers disposed within the second tube body that divide the second tube body into a plurality of second tube segments.

6. The water tank as claimed in claim 5, wherein the heat exchange tube extends in a circumferential direction of the cylinder and is hooped on the cylinder.

7. The water tank of claim 2 wherein the heat exchange tube is a microchannel flat tube.

8. The water tank of any one of claims 1 to 7, wherein the heat exchanger further comprises:

The refrigerant interface assembly comprises an input joint for receiving a refrigerant and an output joint for outputting the refrigerant;

An input pipe assembly connecting the input joint to the first refrigerant inlet and the second refrigerant inlet, and

And one end of the output pipe is connected with the output joint, and the other end of the output pipe is connected with the refrigerant outlet.

9. The water tank of claim 8, wherein the input pipe assembly comprises:

three-way pipe fittings provided with three interfaces;

One end of the main pipeline is connected with the input joint, and the other end of the main pipeline is connected with the first interface of the tee pipe fitting;

A first branch pipe with one end connected to the second port of the three-way pipe and the other end connected to the first refrigerant inlet, and

And one end of the second branch pipe is connected with a third interface of the tee pipe fitting, and the other end of the second branch pipe is connected with the second refrigerant inlet.

10. A water heater comprising a tank as claimed in any one of claims 1 to 9.